[讨论]OG11th-9

9.             Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on surface of the Sun but have never been sighted on the Sun's poles or equator.

(A)         are visible as dark spots on the surface of the Sun but have never been sighted on

(B)         are visible as dark spots that never have been sighted on the surface of the Sun

(C)         appear on the surface of the Sun as darkspots although never sighted at

(D)        appear as dark spots on the surface of the Sun, although never having been sighted at

(E)         appear as dark spots on the Sun's surface, which have never been sighted on

选E？

选A，以前有人讨论过这题哦。

B：平行成分不能该成修饰成分，并且改变转折

C：把be visible改为appear不准确，although虽然表转折，但是没有完成句子，at介词使用不准确

D：把be visible改为appear不准确，although虽然表转折，但是没有完成句子，

E：平行成分不能该成修饰成分，并且改变转折，be visible改为appear不准确，

嗯，我也觉得眼熟。不过找不到在哪里出现过。原来是大全的题目啊。

平行结构，有道理，谢谢！

那大全答案岂不是错了么？

这题OG给出的答案是A

此题同885-19-4, 那么这题是大全错了? 我记得这题当时在A与C中有过长篇讨论, 后来将介词at与on作为判断依据, 看来还是错了?

是呀大全里是C.哪位好心的MM能不能吧OG11里的解释敲出来.我还没OG11呢?

GG先谢谢拉!!!

这个时态应该不是主要的问题因为只要都用了现在时态就算一致的了

我比较支持选择A,不过问题是,答案究竟应该是什么?